SN95 Won't Start

Hi All


So I took my SN95 out of storage 3 weeks ago , ( stored during the winter in a heated garage here in Montreal.

Brought it up to the lake as I have done for the past 5 summers , put it into the water and turned the key.   The Starter turned the engine but it wouldn't run.   Checked the kill switch but that was engaged as it should be.   So since m not a mechanic I had no choice to give it to the local mechanics.

so now here is where it gets interesting. he speaks only french. My French is really bad and certianlly when it comes to engine parts.

he saidit might be what the " set coil" not sure what that is. so he did some testing and changed the " ser coil . I guess its the coil in the distributer. then he siad that he some how broke the "gear" i guess its the distributor drive gear, now he's wiating for the part from ford. he says he checked all the relay and if once he gets the gear part and it still does not work it is going to need the "computer" replaced.   

does any one have any Idea's on this and if it is the computer how much could that cost?

need guidance    thanks

dstop

backfoot100 wrote: What engine are we talking about?

GT-40 MPI/EFI

dstop wrote: so now here is where it gets interesting. he speaks only french. My French is really bad and certianlly when it comes to engine parts. he saidit might be what the " set coil" not sure what that is. so he did some testing and changed the " ser coil . I guess its the coil in the distributer. then he siad that he some how broke the "gear" i guess its the distributor drive gear, now he's wiating for the part from ford. he says he checked all the relay and if once he gets the gear part and it still does not work it is going to need the "computer" replaced.

Is this where Pete jumps in and goes off on a backyard mechanic that has no right to be working on boats?

If so, he would be right...

Dstop - couldn't you have gotten the guy to point to the part he was talking about?

When you turn the ignition switch to on can you hear the fuel pumps run for 1-2 secs (prime cycle)?

This is a very good basic starting point for a GT40 engine that cranks on starter motor but will not fire.

The ECM's for the GT40 are getting scarce and are around $600. They should be repairable as they are a standard Ford EEC1V computer system with a locked custom tune developed by PCM.

I would get your mechanic to do a lot more trouble shooting before just shotgun replacing expensive parts. The language barrier could be interesting to say the least. Is he a competent mechanic on fuel injected engines?

I think he is chasing a no spark problem by the path he is taking. Sounds like he changed the stator (hall effect pickup)inside the distributor and that is how the distributor gear was broken.

Has he tested the TFI ignition module. This TFI trouble shooting chart may help him. It is for auto application and the signals are all the same except the run/IDM signal from memory. It is pretty obvious when doing the tests and comparing to PCM engine manual in reference section.

I'll be the first to admit I know nothing about a 95 GT40. But, is it a RH engine? Is the junkyard dizz gear going to be LH?

lewy, Thanks for the GT40 lesson! as you can tell, I have no idea about all those "new-fangled" boats!


just sounded like dstop already had enough surprises..

give your temp switch and oil switch a smack with a wrench. I did it on my Supra because it kept going into limp mode during skiing. Worked great for a long time.

Hi all.

An update,   I put the boat in the water this afternoon. It ran perfect.   Turns out that the problem was in fact the distributer coil.    The reason he couldn't detect it was that he had bought a new one and installed it, it didnt fix the oroblem. but that one was actually defective.    He had bought a scrap distributer from the junk yard to get the distributer gear, so for fun he tested the used one on my boat. It ran. Then upon closer inspection the new distributer coil had a defect in the connector receptical.    

Brian, "coil" is the the wrong description of this part making it somewhat confusing. The ignition coil is a separate part to the distributor on GT40 not like most HEI distributors.

This incorrectly named part "coil", is most often called the stator in the distributor because it remains stationary while the flags on internal distributor rotating disk trigger the sensor.

GT40 Stator (PIP sensor)

Referred to as pickup sensor or PIP in the GT40 manual. There are no points or electronics in GT40 distributor bar this sensor(stator). The PIP(stator) sensor combined with the TFI ignition module and coil is what generates the spark on GT40. The spark timing uses the ECM (computer) in conjuction with those parts.

Basically acts like a crank position sensor in the newer FI engines that do not use a distributor (individual coils). It is a Hall Effect sensor that uses flags on a rotor disc inside distributor, to break the sensor and indicate crank and piston positioning.

The problem with it is that you have to remove distributor and then disassemble (remove gear and shaft) to replace this part.

You can see the GT40 ignition coil left of the the TFI ignition module in this picture.